1. Onboard AIR780E4G-CAT.1 full network module, supports AT firmware and LUATOS2 development methods, easy for secondary development, recommended to use LUATOS development 2. Onboard RS485 chip is connected to the main serial port (MAIN UART) of AIR780E, supporting baud rate: 230400/115200/57600/38400/19200/9600/4800/2400 3. Onboard flip-type NANOSIM card slot, supports inserting ordinary 4G mobile phone card/IoT card 4. Onboard TYPE-CUSB program burning port and BOOT button are convenient for secondary development and upgrading firmware/program 5. Support TYPE-CUSB5V power supply or KF128 terminal DC8-36V wide voltage power supply Name:4G to RS232 Module Colour:Blue Material:PCB Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * 4G to RS232 Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.